Whats the minimum crusher/mot and grit sand that should be put under paving slabs for a driveway and how much just for a walkway patio? If the paving is new, vibrate twice using a protective rubber mat on the vibrating plate to avoid damage to the paving surface.

One of the more commonly found jointing compounds, Sika’s Fast Fix for patios, is a little more expensive than Dansand No Grow by weight, with a premixed self-setting formula that will cure to form a solid yet permeable joint. Since no concrete information has been provided - neither about the specific product, nor about the application, is not possible to go more into details. To prevent existing weeds from growing, all weeds – including weed roots – must be removed before grouting.I am very disappointed with Dansand,I followed instructions to the letter and now I have more weeds and moss than ever. I just jet washed my huge drive, next step is to kill the weeds and then I am looking to fill the huge gaps between the slabs. The NO GROW mixture consists of washed and dried silica sand as well as nutrient-poor minerals with a high pH value. Likewise, it is important that you have are maintaining your joints on a regular basis, making sure that they are always completely filled.

Reliability, weed prevention, durability and ease of use are the key things we look for when jointing block paving. To avoid weeds and displacements in the coating, the joint must always be filled to the full height of the joint edge and be completely free of soil and other organic material. If you persist in cleaning it away, it will eventually fade as the mineral content of the filling material declines. I always do this now as a matter of course, it stops the salts coming out and frost damage etc, etc. I was considering Dansand No Grow Block Paving Sand - brushing it in with heavy brush then sweeping excess away with fine brush and misting with light spray from the hose pipe to set.It is therefore important that you filled your joints in a height of 4 cm when you first applied DANSAND® NO GROW™ in 2021. Though its natural weed-inhibiting abilities are great for regular use, it will struggle in block-paved patios that experience excessive weed growth. I would be concerned that conventional 4:1 sand / cement mix will crack like it has in the past and it will get to the state it is now, albeit it hasn't been touched or maintained for something like 10-20 years.

However, we recommend a covered storage location, as the plastic foil will not withstand heavy rain.This membrane is resistant to wind and weather and makes it impossible for weed seeds to penetrate into the joint. I bought this product with intention of filling the narrow gaps of block paving the crushed gravels are large and doesn’t go through therefore Wasn’t good for me and wouldn’t recommend to anyone who has paved gap less than 1. Dansand® joint filler is not a weed-killer; it creates a poor growth environment for weeds so that seeds cannot set root. Weeds that are spread by the wind easily find a foothold between your tiles, especially if there is a lack of joint material. The hardened joint becomes strong and elastic, allowing it to withstand repeated sweeping, frost and minor substrate movements.